Improvement in drills for drilling metal



H. SMITH.

. Drill for Drilling Metal. No. 164,604 Patentedjunel5, I875 Ill/l HENRY SMITH, OF MERIDEN, CONNECTICUT, ASSIGNOR TO CHARLES PARKER, OF SAME PLACE.

IMPROVEMENT IN DRILLS FOR DRILLING METAL.

Specification forming part of Letters Patent No. 164,60 fl, dated June 15, 1875 application filed May 20, 1875.

To all whom it may concern Be it known that I, HENRY SMITH, of Meriden, in the county of New Haven and State of Connecticut, have invented a new Hand Drill- Stock; and I do hereby declare the following, when taken in connection with the accompanying drawings and the letters of reference marked thereon, to be a full, clear, and exact description of the same, and which said drawings constitute part of this specification, and represent, in

Figure 1, perspective view; Fig. 2, vertical central section; Fig. 3, vertical section at right angles to that of Fig. 2.

This invention relates to an improvement in what is commonly known as drill'stockthat is to say, a stock for holding the drill for drilling metal or other material by hand-the object of the invention being to construct a simple drill, in which the mechanism shall be inclosed; and it consists in a case formed in two parts with a chamber for the driving-gear, and also to form a bearing, both for the driving-shaft and for the mandrel or drill-spindle.

A is one part, and B the other part, of the case, both substantially alike, the central portion made of cylindrical form inclosin g a chamber, G. Centrally through the part B one of the bearings D is formed for the crank-shaft E, and a corresponding bearing, F, in the other part. Upon the upper side of each part of the cylinder half of the vertical sleeve Gr 1s formed, into which the head or hearing H is set, and through the sleeve and piece H a single screw, I, is set, which holds the case together at that point and the part H in'its place. Upon the lower or opposite side of the cylinder a second sleeve, L, is formed, in like manner as the first-that is, half upon each part-and into this the drill-spindle N is fitted, so as to revolve freely therein, and take a bearing to prevent axial movement. Around the sleeve L a band, P, is placed and secured, so as to hold the case together at that end, the upper and lower points of security being all that is required. On the shaft E a beveled gear, S, is fixed, working into a pinion, R, on the spindle N, and the shaft E fitted with a crank, T, so that by turning the crank the spindle will be revolved in like manner as other drill-stock.

For convenience of holding the drill-stock, a handle, WV, is placed upon one part of the case in line with the driving-shaft, as seen in Fig. 3.

I claim- The herein-described drill-stock, consisting of the inclosing-case A B, constructed with bearings F D, for the driving-shaft, with the sleeve G upon the upper side to receive the head, and sleeve L upon the lower side to form a bearing for and hold the spindle N, the said case constructed in two parts secured together, substantially as described, and combined with the driving-shaft E, crank T, gear and pinion S R, substantially as set forth.

HENRY SMITH. Witnesses:

GEORGE G. MERRIAM, RALPH A. PALMER.

ATENT OFFICE 

